Issaquah, 98027

Lake Sammamish State Park

Book on Washington State ParksLakesideForestFamily-friendlyHikingBirdwatchingWildlife watchingSwim beach

Availability

Each day shows how many of this campground’s sites are open.

About this spot

Lake Sammamish State Park is a 533-acre day-use park with 6,858 feet of waterfront on Lake Sammamish. The area around the lake carries cultural significance as a gathering place for at least four Native American tribes. Boasting trails through deciduous forest and wetlands and two lakefront beaches, this park provides a family outdoor experience just off the urban grid. You may even get to share space with one of the great blue herons or bald eagles that nest in the park.

Typical weather

Air temperature

Average daily high-low
Average daily high and low air temperature, January through DecemberEach vertical bar shows a monthly average daily high and low in degrees Fahrenheit.47°35°JJanuary: average high 47°F, average low 35°F46°34°FFebruary: average high 46°F, average low 34°F53°37°MMarch: average high 53°F, average low 37°F58°41°AApril: average high 58°F, average low 41°F66°48°MMay: average high 66°F, average low 48°F71°53°JJune: average high 71°F, average low 53°F78°57°JJuly: average high 78°F, average low 57°F78°58°AAugust: average high 78°F, average low 58°F70°54°SSeptember: average high 70°F, average low 54°F61°46°OOctober: average high 61°F, average low 46°F51°40°NNovember: average high 51°F, average low 40°F46°36°DDecember: average high 46°F, average low 36°F

5-year average · Open-Meteo

Lake Sammamish

Average water temperature
Average water temperature for Lake Sammamish, January through DecemberEach point shows the monthly average water temperature in degrees Fahrenheit.38°JJanuary: average water temperature 38°F41°FFebruary: average water temperature 41°F46°MMarch: average water temperature 46°F48°AApril: average water temperature 48°F53°MMay: average water temperature 53°F59°JJune: average water temperature 59°F60°JJuly: average water temperature 60°F58°AAugust: average water temperature 58°F57°SSeptember: average water temperature 57°F52°OOctober: average water temperature 52°F44°NNovember: average water temperature 44°F41°DDecember: average water temperature 41°F

Water: Water Quality Portal — 75 field-sample stations